20289845000 has 40 divisors (see below), whose sum is σ = 47539118550. Its totient is φ = 8115936000.

The previous prime is 20289844907. The next prime is 20289845021. The reversal of 20289845000 is 54898202.

It can be written as a sum of positive squares in 5 ways, for example, as 55920484 + 20233924516 = 7478^2 + 142246^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2023985 + ... + 2033984.

Almost surely, 2^20289845000 is an apocalyptic number.

20289845000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20289845000 is an abundant number, since it is smaller than the sum of its proper divisors (27249273550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20289845000 is an equidigital number, since it uses as much as digits as its factorization.

20289845000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4057995 (or 4057976 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 20289845000 in words is "twenty billion, two hundred eighty-nine million, eight hundred forty-five thousand".